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Two objects, one of mass m1 = 2 kg and the second of unknown mass, are connected by a compressed spring with negligible mass. The system is at rest on a frictionless table. Both objects are released simultaneously, and m1 is observed to recoil with velocity v1 =
2 m/s
, and m2 shots forward with velocity v2 = 4 m/s
. What is the mass of m2?
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